No, usually it's Removable, Hard drive, then CD.
That doesn't make sense... at all.
the only time it's appropriate to boot to a CD when the drive contains a bootable CD. If it doesn't contain one, it doesn't boot to it and moves on to hard drive. In this way, you can boot to a CD by inserting a bootable CD and restarting instead of going through the ridiculous hassle of changing your boot order every time you need to boot to a CD...